Noise / rattling during cruise /idle with video

[pooner]

Hi, first post here and first older Mopar

I have a noise, a ticking/knocking noise when i drive, specially during cruise at around 30-50mph.
What could this be?
I have enough oil in it, 20w50. Sounds harder in the video than in real life, but it resembles that of a lifter problem.
Quiet when cold start but comes as the oil heats up. Very annoying, was also considering manifold gasket on the headers...
Engine is a 440 in a 69 coronet sedan but engine is newer.
Oil pressure hot idle is 10-15psi, hot cruise at around 1800rpm we have around 40psi.

Here is video Video here


Best regards from Sweden.

 

[PurpleBeeper]

It’s hard to tell, but it sounds like the front of the engine. Try to narrow it down further. It sounds like either a worn/bent rocker arm/pushrod/cam lifter on one of the front cylinders OR possibly the fuel pump pushrod. Because it’s quieter cold, my first guess if you have one lifter that is bad

 

[turbine68rt]

I'd also be concerned about the throttle not freely returning to curb idle.

 

[1967coronet]

That does not sound like a exhaust / header leak.
Time to pull the valve covers.
If you have a old set of crap covers you can cut the top off one. Pull one side and set the cut one on and start it.
The put the good cover back on and repeat with the other side.
You should be able to tell then what side the noise is from.
Then roll the engine around by hand checking rockers , lifters, push rods ect.
On your video it does not sound like a rod or main to me but videos can fool you.
I chased a noise simular to yours once and it ended up a wrist was a little loose.

 

[Charles Cook]

Only time I heard that type of knock it was a friend’s car and his mechanic called it a piston slap. What ever that means.

 

[RJRENTON]

Hi, first post here and first older Mopar

I have a noise, a ticking/knocking noise when i drive, specially during cruise at around 30-50mph.
What could this be?
I have enough oil in it, 20w50. Sounds harder in the video than in real life, but it resembles that of a lifter problem.
Quiet when cold start but comes as the oil heats up. Very annoying, was also considering manifold gasket on the headers...
Engine is a 440 in a 69 coronet sedan but engine is newer.
Oil pressure hot idle is 10-15psi, hot cruise at around 1800rpm we have around 40psi.

Here is video Video here


Best regards from Sweden.

IMO......# 1 or # 2 rod bearing. What is the oil pressure at idle?.........
BOB RENTON

 

[pooner]

WOW! What a response from the community! Appreciate all your inputs, made a short video this morning coming home after leaving one of the boys at school.
Sounds like coming from front/middle of engine. The crank pulley seems to wobble but can also be hallucination...
Yes i will fix the shiftdown/throttle linkage @turbine68rt

here is the video. Video here

//Pontus

 

[BeepBeepRR]

Sounds to me like a bottom end knock. Float the throttle between like 2000 and 3000 rpm and see if the knock gets louder and faster.

Watch this video.

 

[pooner]

Sounds to me like a bottom end knock. Float the throttle between like 2000 and 3000 rpm and see if the knock gets louder and faster.

Watch this video.

Hi, tried it but no difference, knock is barely noticeable when revving

 

[pooner]

Also tried today and disconnected one spark plug after the other while running to see if the noise dissapears but no luck there.

 

[Rusty knuckles]

Collapsed lifter? Your oil pressure is a fair bit lower than I would be comfortable with in my car too.

 

[pooner]

Collapsed lifter? Your oil pressure is a fair bit lower than I would be comfortable with in my car too.

Could be, going to check the PS pump soon, it was low on atf... 10-12psi hot idle is little low i think also, if i for example hot idle and put in drive the oil pressure light will start flimmering little bit, but would a collapsed lifter lower the pressure so much? Its 20w50 in it now, maybe i should do a swap to a straight 30w. Engine is from 1976 if it makes any difference..

//Pontus

 

[khryslerkid]

I'd pull the passenger side valve cover. Sounds louder in your video on that side. The sound has the cadence of a rocker.

It's just the outer edge of your bottom pully that's wobbly. The next groove back looks true.

 

[pooner]

IMO......# 1 or # 2 rod bearing. What is the oil pressure at idle?.........
BOB RENTON

HI, about 10-15 psi at hot idle.

 

[RJRENTON]

Collapsed lifter? Your oil pressure is a fair bit lower than I would be comfortable with in my car too.

Not likely.....with low idle oil pressure, it's likely that a rod bearing (and possibly a main bearing) is failing, limiting oil availability for the corresponding rod bearing. Use FSM clearances for bearing clearances. A collapse lifter has a sharp metallic clicking sound when operating. Pull both right and left valve covers and observe rocker arm operation. OK, do the easy, unrelated stuff first...from exhaust leaks to torque settings of the RR tire valve cap, to the oil pump drive etc......you are going have to remove the oil pan (or pull the engine) and check bearing clearances, one throw at a time, b4 the failing bearing damages the crank......this will not be an easy fix or an inexpensive fix.......just my opinion.......
BOB RENTON

 

[icetech]

Before you do anything else... check your converter bolts.. takes 5 mins and there's a good chance that's the problem.. it sounds just like a knock.

 

[pooner]

Before you do anything else... check your converter bolts.. takes 5 mins and there's a good chance that's the problem.. it sounds just like a knock.

Will do once i get it up in the air, or is it easy doable from the driveway maybe? i guess there are 4 bolts to check that holds it to the flexplate?

 

[RJRENTON]

Before you do anything else... check your converter bolts.. takes 5 mins and there's a good chance that's the problem.. it sounds just like a knock.

.....AND.....if the converter hardware is torqued to correct value.........then what????
BOB RENTON

 

[icetech]

Will do once i get it up in the air, or is it easy doable from the driveway maybe? i guess there are 4 bolts to check that holds it to the flexplate?

yup... only need to check 1.. if it is making that noise they are all 4 loose.. and if 1 is loose they all are.. have seen guys freak out thinking it's a knock and it's just TC bolts... and the way that sounds how it's more like a Crisp knock (hard to explain) i am betting it's those 4 bolts.. and yeah can do it in the driveway

 

[icetech]

.....AND.....if the converter hardware is torqued to correct value.........then what????
BOB RENTON

well if it's not loose than thats not the problem if it's tight and is moving, something bad happened But it's easier to check 1 tc bolt real quick than start diving into the motor